mco0626

Hello, could someone help me. we just bought a Techwell 6805 PCI DVR Card from ebay. as soon as we install the DVR CARD, computer wont boot, or just keeps displaying nothing. we tried it on Acer Veriton with i5 processor, 4 gig ram, 2 terabyte HDD and running Windows 7 Professional, it did'nt work, the computer freezes and does not boot, but if we took the DVR CARD out, the pc is working fine. we also tried installing it on a PC with Pentium 4 Processor, 1 gig ram, 40 gig HDD and running on Windows XP, we have the same problem, the pc wont boot, it just freezes, even if we try accessing the bios, it wont let us because as soon as we turn the pc on, it freezes. could anyone here help us with this?? thanks..